<div  ng-controller="ExamIndexListCtrl"  class="ExamList card border-light mb-3 {{active}}"  >
    <div class="card-header">答题表</div>
    <div class="card-body">
    <button ng-click="SetItem(item)" type="button" class="btn btn-{{item.active}} Dt-list" ng-repeat="item in List">{{item.index}}</button>

    </div>
</div>